[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / comedi / drivers / unioxx5.c

/***************************************************************************
 *                                                                         *
 *  comedi/drivers/unioxx5.c                                               *
 *  Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.           *
 *                                                                         *
 *  Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru]      *
 *                                                                         *
 *  COMEDI - Linux Control and Measurement Device Interface                *
 *  Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>              *
 *                                                                         *
 *  This program is free software; you can redistribute it and/or modify   *
 *  it under the terms of the GNU General Public License as published by   *
 *  the Free Software Foundation; either version 2 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program is distributed in the hope that it will be useful,        *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
 *  GNU General Public License for more details.                           *
 *                                                                         *
 *  You should have received a copy of the GNU General Public License      *
 *  along with this program; if not, write to the Free Software            *
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.              *
 *                                                                         *
 ***************************************************************************/
/*

Driver: unioxx5
Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.
Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru>
Status: unknown
Updated: 2006-10-09
Devices: [Fastwel] UNIOxx-5 (unioxx5),

 This card supports digital and analog I/O. It written for g01
 subdevices only.
 channels range: 0 .. 23 dio channels
 and 0 .. 11 analog modules range
 During attaching unioxx5 module displays modules identifiers
 (see dmesg after comedi_config) in format:
 | [module_number] module_id |

*/

#include "../comedidev.h"
#include <linux/ioport.h>
#include <linux/slab.h>

#define DRIVER_NAME "unioxx5"
#define UNIOXX5_SIZE 0x10
#define UNIOXX5_SUBDEV_BASE 0xA000	/* base addr of first subdev */
#define UNIOXX5_SUBDEV_ODDS 0x400

/* modules types */
#define MODULE_DIGITAL 0
#define MODULE_OUTPUT_MASK 0x80	/* analog input/output */

/* constants for digital i/o */
#define UNIOXX5_NUM_OF_CHANS 24

/* constants for analog i/o */
#define TxBE  0x10		/* transmit buffer enable */
#define RxCA  0x20		/* 1 receive character available */
#define Rx2CA 0x40		/* 2 receive character available */
#define Rx4CA 0x80		/* 4 receive character available */

/* bytes mask errors */
#define Rx2CA_ERR_MASK 0x04	/* 2 bytes receiving error */
#define Rx4CA_ERR_MASK 0x08	/* 4 bytes receiving error */

/* channel modes */
#define ALL_2_INPUT  0		/* config all digital channels to input */
#define ALL_2_OUTPUT 1		/* config all digital channels to output */

/* 'private' structure for each subdevice */
struct unioxx5_subd_priv {
	int usp_iobase;
	/* 12 modules. each can be 70L or 73L */
	unsigned char usp_module_type[12];
	/* for saving previous written value for analog modules */
	unsigned char usp_extra_data[12][4];
	unsigned char usp_prev_wr_val[3];	/* previous written value */
	unsigned char usp_prev_cn_val[3];	/* previous channel value */
};

static int unioxx5_subdev_write(struct comedi_device *dev,
				struct comedi_subdevice *subdev,
				struct comedi_insn *insn, unsigned int *data);
static int unioxx5_subdev_read(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data);
static int unioxx5_insn_config(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data);
static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
				   unsigned int *data, int channel, int minor);
static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor);
/* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */
static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor);
static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
				 unsigned int *data, int channel, int minor);
static int __unioxx5_define_chan_offset(int chan_num);
static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel);

static int unioxx5_subdev_read(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data)
{
	struct unioxx5_subd_priv *usp = subdev->private;
	int channel, type;

	channel = CR_CHAN(insn->chanspec);
	/* defining module type(analog or digital) */
	type = usp->usp_module_type[channel / 2];

	if (type == MODULE_DIGITAL) {
		if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
			return -1;
	} else {
		if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
			return -1;
	}

	return 1;
}

static int unioxx5_subdev_write(struct comedi_device *dev,
				struct comedi_subdevice *subdev,
				struct comedi_insn *insn, unsigned int *data)
{
	struct unioxx5_subd_priv *usp = subdev->private;
	int channel, type;

	channel = CR_CHAN(insn->chanspec);
	/* defining module type(analog or digital) */
	type = usp->usp_module_type[channel / 2];

	if (type == MODULE_DIGITAL) {
		if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
			return -1;
	} else {
		if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
			return -1;
	}

	return 1;
}

/* for digital modules only */
static int unioxx5_insn_config(struct comedi_device *dev,
			       struct comedi_subdevice *subdev,
			       struct comedi_insn *insn, unsigned int *data)
{
	int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
	struct unioxx5_subd_priv *usp = subdev->private;
	int mask = 1 << (channel & 0x07);

	type = usp->usp_module_type[channel / 2];

	if (type != MODULE_DIGITAL) {
		printk(KERN_ERR
		       "comedi%d: channel configuration accessible only for digital modules\n",
		       dev->minor);
		return -1;
	}

	channel_offset = __unioxx5_define_chan_offset(channel);
	if (channel_offset < 0) {
		printk(KERN_ERR
		       "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
		       dev->minor, channel);
		return -1;
	}

	/* gets previously written value */
	flags = usp->usp_prev_cn_val[channel_offset - 1];

	switch (*data) {
	case COMEDI_INPUT:
		flags &= ~mask;
		break;
	case COMEDI_OUTPUT:
		flags |= mask;
		break;
	default:
		printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
		return -1;
	}

	/*                                                        *\
	 * sets channels buffer to 1(after this we are allowed to *
	 * change channel type on input or output)                *
	 \*                                                        */
	outb(1, usp->usp_iobase + 0);
	/* changes type of _one_ channel */
	outb(flags, usp->usp_iobase + channel_offset);
	/* sets channels bank to 0(allows directly input/output) */
	outb(0, usp->usp_iobase + 0);
	/* saves written value */
	usp->usp_prev_cn_val[channel_offset - 1] = flags;

	return 0;
}

/* initializing subdevice with given address */
static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
				 int subdev_iobase, int minor)
{
	struct unioxx5_subd_priv *usp;
	int i, to, ndef_flag = 0;

	if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
		printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
		return -EIO;
	}

	usp = kzalloc(sizeof(*usp), GFP_KERNEL);

	if (usp == NULL) {
		printk(KERN_ERR "comedi%d: error! --> out of memory!\n", minor);
		return -1;
	}

	usp->usp_iobase = subdev_iobase;
	printk(KERN_INFO "comedi%d: |", minor);

	/* defining modules types */
	for (i = 0; i < 12; i++) {
		to = 10000;

		__unioxx5_analog_config(usp, i * 2);
		/* sends channel number to card */
		outb(i + 1, subdev_iobase + 5);
		outb('H', subdev_iobase + 6);	/* requests EEPROM world */
		while (!(inb(subdev_iobase + 0) & TxBE))
			;	/* waits while writting will be allowed */
		outb(0, subdev_iobase + 6);

		/* waits while reading of two bytes will be allowed */
		while (!(inb(subdev_iobase + 0) & Rx2CA)) {
			if (--to <= 0) {
				ndef_flag = 1;
				break;
			}
		}

		if (ndef_flag) {
			usp->usp_module_type[i] = 0;
			ndef_flag = 0;
		} else
			usp->usp_module_type[i] = inb(subdev_iobase + 6);

		printk(" [%d] 0x%02x |", i, usp->usp_module_type[i]);
		udelay(1);
	}

	printk("\n");

	/* initial subdevice for digital or analog i/o */
	subdev->type = COMEDI_SUBD_DIO;
	subdev->private = usp;
	subdev->subdev_flags = SDF_READABLE | SDF_WRITABLE;
	subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
	subdev->maxdata = 0xFFF;
	subdev->range_table = &range_digital;
	subdev->insn_read = unioxx5_subdev_read;
	subdev->insn_write = unioxx5_subdev_write;
	/* for digital modules only!!! */
	subdev->insn_config = unioxx5_insn_config;

	printk(KERN_INFO "subdevice configured\n");

	return 0;
}

static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
				   unsigned int *data, int channel, int minor)
{
	int channel_offset, val;
	int mask = 1 << (channel & 0x07);

	channel_offset = __unioxx5_define_chan_offset(channel);
	if (channel_offset < 0) {
		printk(KERN_ERR
		       "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
		       minor, channel);
		return 0;
	}

	/* getting previous written value */
	val = usp->usp_prev_wr_val[channel_offset - 1];

	if (*data)
		val |= mask;
	else
		val &= ~mask;

	outb(val, usp->usp_iobase + channel_offset);
	/* saving new written value */
	usp->usp_prev_wr_val[channel_offset - 1] = val;

	return 1;
}

/* function for digital reading */
static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor)
{
	int channel_offset, mask = 1 << (channel & 0x07);

	channel_offset = __unioxx5_define_chan_offset(channel);
	if (channel_offset < 0) {
		printk(KERN_ERR
		       "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
		       minor, channel);
		return 0;
	}

	*data = inb(usp->usp_iobase + channel_offset);
	*data &= mask;

	if (channel_offset > 1)
		channel -= 2 << channel_offset;	/* this operation is created for correct readed value to 0 or 1 */
	*data >>= channel;
	return 1;
}

#if 0				/* not used? */
static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode)
{
	int i, mask;

	mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
	printk("COMEDI: mode = %d\n", mask);

	outb(1, usp->usp_iobase + 0);

	for (i = 0; i < 3; i++)
		outb(mask, usp->usp_iobase + i);

	outb(0, usp->usp_iobase + 0);
}
#endif

static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
				  unsigned int *data, int channel, int minor)
{
	int module, i;

	module = channel / 2;	/* definig module number(0 .. 11) */
	i = (channel % 2) << 1;	/* depends on type of channel (A or B) */

	/* defining if given module can work on output */
	if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
		printk(KERN_ERR
		       "comedi%d: module in position %d with id 0x%0x is for input only!\n",
		       minor, module, usp->usp_module_type[module]);
		return 0;
	}

	__unioxx5_analog_config(usp, channel);
	/* saving minor byte */
	usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
	/* saving major byte */
	usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);

	/* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
	/* sending module number to card(1 .. 12) */
	outb(module + 1, usp->usp_iobase + 5);
	outb('W', usp->usp_iobase + 6);	/* sends (W)rite command to module */

	/* sending for bytes to module(one byte per cycle iteration) */
	for (i = 0; i < 4; i++) {
		while (!((inb(usp->usp_iobase + 0)) & TxBE))
			;	/* waits while writting will be allowed */
		outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
	}

	return 1;
}

static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
				 unsigned int *data, int channel, int minor)
{
	int module_no, read_ch;
	char control;

	module_no = channel / 2;
	read_ch = channel % 2;	/* depend on type of channel (A or B) */

	/* defining if given module can work on input */
	if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
		printk(KERN_ERR
		       "comedi%d: module in position %d with id 0x%02x is for output only",
		       minor, module_no, usp->usp_module_type[module_no]);
		return 0;
	}

	__unioxx5_analog_config(usp, channel);
	/* sends module number to card(1 .. 12) */
	outb(module_no + 1, usp->usp_iobase + 5);
	outb('V', usp->usp_iobase + 6);	/* sends to module (V)erify command */
	control = inb(usp->usp_iobase);	/* get control register byte */

	/* waits while reading four bytes will be allowed */
	while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA))
		;

	/* if four bytes readding error occurs - return 0(false) */
	if ((control & Rx4CA_ERR_MASK)) {
		printk("COMEDI: 4 bytes error\n");
		return 0;
	}

	if (read_ch)
		*data = inw(usp->usp_iobase + 6);	/* channel B */
	else
		*data = inw(usp->usp_iobase + 4);	/* channel A */

	return 1;
}

/* configure channels for analog i/o (even to output, odd to input) */
static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel)
{
	int chan_a, chan_b, conf, channel_offset;

	channel_offset = __unioxx5_define_chan_offset(channel);
	conf = usp->usp_prev_cn_val[channel_offset - 1];
	chan_a = chan_b = 1;

	/* setting channel A and channel B mask */
	if (channel % 2 == 0) {
		chan_a <<= channel & 0x07;
		chan_b <<= (channel + 1) & 0x07;
	} else {
		chan_a <<= (channel - 1) & 0x07;
		chan_b <<= channel & 0x07;
	}

	conf |= chan_a;		/* even channel ot output */
	conf &= ~chan_b;	/* odd channel to input */

	outb(1, usp->usp_iobase + 0);
	outb(conf, usp->usp_iobase + channel_offset);
	outb(0, usp->usp_iobase + 0);

	usp->usp_prev_cn_val[channel_offset - 1] = conf;
}

/*                                                    *\
 * this function defines if the given channel number  *
 * enters in default numeric interspace(from 0 to 23) *
 * and it returns address offset for usage needed     *
 * channel.                                           *
\*                                                    */

static int __unioxx5_define_chan_offset(int chan_num)
{

	if (chan_num < 0 || chan_num > 23)
		return -1;

	return (chan_num >> 3) + 1;
}

static int unioxx5_attach(struct comedi_device *dev,
			  struct comedi_devconfig *it)
{
	int iobase, i, n_subd;
	int id, num, ba;

	iobase = it->options[0];

	dev->board_name = DRIVER_NAME;
	dev->iobase = iobase;
	iobase += UNIOXX5_SUBDEV_BASE;

	/* defining number of subdevices and getting they types (it must be 'g01')  */
	for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
		id = inb(ba + 0xE);
		num = inb(ba + 0xF);

		if (id != 'g' || num != 1)
			continue;

		n_subd++;
	}

	/* unioxx5 can has from two to four subdevices */
	if (n_subd < 2) {
		printk(KERN_ERR
		       "your card must has at least 2 'g01' subdevices\n");
		return -1;
	}

	if (alloc_subdevices(dev, n_subd) < 0) {
		printk(KERN_ERR "out of memory\n");
		return -ENOMEM;
	}

	/* initializing each of for same subdevices */
	for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
		if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
					  dev->minor) < 0)
			return -1;
	}

	printk(KERN_INFO "attached\n");
	return 0;
}

static int unioxx5_detach(struct comedi_device *dev)
{
	int i;
	struct comedi_subdevice *subdev;
	struct unioxx5_subd_priv *usp;

	for (i = 0; i < dev->n_subdevices; i++) {
		subdev = &dev->subdevices[i];
		usp = subdev->private;
		release_region(usp->usp_iobase, UNIOXX5_SIZE);
		kfree(subdev->private);
	}

	return 0;
}

static struct comedi_driver unioxx5_driver = {
	.driver_name	= DRIVER_NAME,
	.module		= THIS_MODULE,
	.attach		= unioxx5_attach,
	.detach		= unioxx5_detach,
};
module_comedi_driver(unioxx5_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
110526ed KD	1	/***************************************************************************
	2	* *
	3	* comedi/drivers/unioxx5.c *
	4	* Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. *
	5	* *
	6	* Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru] *
	7	* *
	8	* COMEDI - Linux Control and Measurement Device Interface *
	9	* Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org> *
	10	* *
	11	* This program is free software; you can redistribute it and/or modify *
	12	* it under the terms of the GNU General Public License as published by *
	13	* the Free Software Foundation; either version 2 of the License, or *
	14	* (at your option) any later version. *
	15	* *
	16	* This program is distributed in the hope that it will be useful, *
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
	19	* GNU General Public License for more details. *
	20	* *
	21	* You should have received a copy of the GNU General Public License *
	22	* along with this program; if not, write to the Free Software *
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
	24	* *
	25	***************************************************************************/
	26	/*
	27
	28	Driver: unioxx5
	29	Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.
	30	Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru>
	31	Status: unknown
	32	Updated: 2006-10-09
	33	Devices: [Fastwel] UNIOxx-5 (unioxx5),
	34
	35	This card supports digital and analog I/O. It written for g01
	36	subdevices only.
	37	channels range: 0 .. 23 dio channels
	38	and 0 .. 11 analog modules range
	39	During attaching unioxx5 module displays modules identifiers
	40	(see dmesg after comedi_config) in format:
	41	\| [module_number] module_id \|
	42
	43	*/
	44
	45	#include "../comedidev.h"
	46	#include <linux/ioport.h>
5a0e3ad6	47	#include <linux/slab.h>
110526ed KD	48
	49	#define DRIVER_NAME "unioxx5"
	50	#define UNIOXX5_SIZE 0x10
	51	#define UNIOXX5_SUBDEV_BASE 0xA000 /* base addr of first subdev */
	52	#define UNIOXX5_SUBDEV_ODDS 0x400
	53
	54	/* modules types */
	55	#define MODULE_DIGITAL 0
	56	#define MODULE_OUTPUT_MASK 0x80 /* analog input/output */
	57
	58	/* constants for digital i/o */
	59	#define UNIOXX5_NUM_OF_CHANS 24
	60
	61	/* constants for analog i/o */
	62	#define TxBE 0x10 /* transmit buffer enable */
	63	#define RxCA 0x20 /* 1 receive character available */
	64	#define Rx2CA 0x40 /* 2 receive character available */
	65	#define Rx4CA 0x80 /* 4 receive character available */
	66
	67	/* bytes mask errors */
	68	#define Rx2CA_ERR_MASK 0x04 /* 2 bytes receiving error */
	69	#define Rx4CA_ERR_MASK 0x08 /* 4 bytes receiving error */
	70
	71	/* channel modes */
	72	#define ALL_2_INPUT 0 /* config all digital channels to input */
	73	#define ALL_2_OUTPUT 1 /* config all digital channels to output */
	74
	75	/* 'private' structure for each subdevice */
33a4640f	76	struct unioxx5_subd_priv {
110526ed	77	int usp_iobase;
33e73e00 R	78	/* 12 modules. each can be 70L or 73L */
	79	unsigned char usp_module_type[12];
	80	/* for saving previous written value for analog modules */
	81	unsigned char usp_extra_data[12][4];
110526ed KD	82	unsigned char usp_prev_wr_val[3]; /* previous written value */
110526ed KD	83	unsigned char usp_prev_cn_val[3]; /* previous channel value */
33a4640f	84	};
110526ed	85
0a85b6f0 MT	86	static int unioxx5_subdev_write(struct comedi_device *dev,
	87	struct comedi_subdevice *subdev,
	88	struct comedi_insn insn, unsigned int data);
	89	static int unioxx5_subdev_read(struct comedi_device *dev,
	90	struct comedi_subdevice *subdev,
	91	struct comedi_insn insn, unsigned int data);
	92	static int unioxx5_insn_config(struct comedi_device *dev,
	93	struct comedi_subdevice *subdev,
	94	struct comedi_insn insn, unsigned int data);
0a85b6f0 MT	95	static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
	96	unsigned int *data, int channel, int minor);
	97	static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
	98	unsigned int *data, int channel, int minor);
2696fb57	99	/* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */
0a85b6f0 MT	100	static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
	101	unsigned int *data, int channel, int minor);
	102	static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
	103	unsigned int *data, int channel, int minor);
110526ed	104	static int __unioxx5_define_chan_offset(int chan_num);
da91b269	105	static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel);
110526ed	106
0a85b6f0 MT	107	static int unioxx5_subdev_read(struct comedi_device *dev,
	108	struct comedi_subdevice *subdev,
	109	struct comedi_insn insn, unsigned int data)
110526ed	110	{
33a4640f	111	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	112	int channel, type;
	113
	114	channel = CR_CHAN(insn->chanspec);
33e73e00 R	115	/* defining module type(analog or digital) */
33e73e00 R	116	type = usp->usp_module_type[channel / 2];
110526ed KD	117
	118	if (type == MODULE_DIGITAL) {
	119	if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
	120	return -1;
	121	} else {
	122	if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
	123	return -1;
	124	}
	125
	126	return 1;
	127	}
	128
0a85b6f0 MT	129	static int unioxx5_subdev_write(struct comedi_device *dev,
	130	struct comedi_subdevice *subdev,
	131	struct comedi_insn insn, unsigned int data)
110526ed	132	{
33a4640f	133	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	134	int channel, type;
	135
	136	channel = CR_CHAN(insn->chanspec);
33e73e00 R	137	/* defining module type(analog or digital) */
33e73e00 R	138	type = usp->usp_module_type[channel / 2];
110526ed KD	139
	140	if (type == MODULE_DIGITAL) {
	141	if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
	142	return -1;
	143	} else {
	144	if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
	145	return -1;
	146	}
	147
	148	return 1;
	149	}
	150
	151	/* for digital modules only */
0a85b6f0 MT	152	static int unioxx5_insn_config(struct comedi_device *dev,
	153	struct comedi_subdevice *subdev,
	154	struct comedi_insn insn, unsigned int data)
110526ed KD	155	{
110526ed KD	156	int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
33a4640f	157	struct unioxx5_subd_priv *usp = subdev->private;
110526ed KD	158	int mask = 1 << (channel & 0x07);
	159
	160	type = usp->usp_module_type[channel / 2];
	161
	162	if (type != MODULE_DIGITAL) {
	163	printk(KERN_ERR
0a85b6f0 MT	164	"comedi%d: channel configuration accessible only for digital modules\n",
0a85b6f0 MT	165	dev->minor);
110526ed KD	166	return -1;
	167	}
	168
c3744138 BP	169	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	170	if (channel_offset < 0) {
110526ed	171	printk(KERN_ERR
0a85b6f0 MT	172	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	173	dev->minor, channel);
110526ed KD	174	return -1;
	175	}
	176
	177	/* gets previously written value */
	178	flags = usp->usp_prev_cn_val[channel_offset - 1];
	179
	180	switch (*data) {
	181	case COMEDI_INPUT:
	182	flags &= ~mask;
	183	break;
	184	case COMEDI_OUTPUT:
	185	flags \|= mask;
	186	break;
	187	default:
	188	printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
	189	return -1;
	190	}
	191
	192	/* *\
	193	* sets channels buffer to 1(after this we are allowed to *
	194	* change channel type on input or output) *
	195	\* */
	196	outb(1, usp->usp_iobase + 0);
33e73e00 R	197	/* changes type of _one_ channel */
	198	outb(flags, usp->usp_iobase + channel_offset);
	199	/* sets channels bank to 0(allows directly input/output) */
	200	outb(0, usp->usp_iobase + 0);
	201	/* saves written value */
	202	usp->usp_prev_cn_val[channel_offset - 1] = flags;
110526ed KD	203
	204	return 0;
	205	}
	206
110526ed	207	/* initializing subdevice with given address */
0a85b6f0 MT	208	static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
0a85b6f0 MT	209	int subdev_iobase, int minor)
110526ed	210	{
33a4640f	211	struct unioxx5_subd_priv *usp;
110526ed KD	212	int i, to, ndef_flag = 0;
	213
	214	if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
	215	printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
	216	return -EIO;
	217	}
	218
32414878	219	usp = kzalloc(sizeof(*usp), GFP_KERNEL);
c3744138 BP	220
c3744138 BP	221	if (usp == NULL) {
81a14956	222	printk(KERN_ERR "comedi%d: error! --> out of memory!\n", minor);
110526ed KD	223	return -1;
	224	}
	225
	226	usp->usp_iobase = subdev_iobase;
33e73e00	227	printk(KERN_INFO "comedi%d: \|", minor);
110526ed KD	228
	229	/* defining modules types */
	230	for (i = 0; i < 12; i++) {
	231	to = 10000;
	232
	233	__unioxx5_analog_config(usp, i * 2);
33e73e00 R	234	/* sends channel number to card */
33e73e00 R	235	outb(i + 1, subdev_iobase + 5);
110526ed	236	outb('H', subdev_iobase + 6); /* requests EEPROM world */
6fd071cc JS	237	while (!(inb(subdev_iobase + 0) & TxBE))
6fd071cc JS	238	; /* waits while writting will be allowed */
110526ed KD	239	outb(0, subdev_iobase + 6);
	240
	241	/* waits while reading of two bytes will be allowed */
	242	while (!(inb(subdev_iobase + 0) & Rx2CA)) {
	243	if (--to <= 0) {
	244	ndef_flag = 1;
	245	break;
	246	}
	247	}
	248
	249	if (ndef_flag) {
	250	usp->usp_module_type[i] = 0;
	251	ndef_flag = 0;
	252	} else
	253	usp->usp_module_type[i] = inb(subdev_iobase + 6);
	254
	255	printk(" [%d] 0x%02x \|", i, usp->usp_module_type[i]);
5f74ea14	256	udelay(1);
110526ed KD	257	}
	258
	259	printk("\n");
	260
	261	/* initial subdevice for digital or analog i/o */
	262	subdev->type = COMEDI_SUBD_DIO;
	263	subdev->private = usp;
	264	subdev->subdev_flags = SDF_READABLE \| SDF_WRITABLE;
	265	subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
	266	subdev->maxdata = 0xFFF;
	267	subdev->range_table = &range_digital;
	268	subdev->insn_read = unioxx5_subdev_read;
	269	subdev->insn_write = unioxx5_subdev_write;
33e73e00 R	270	/* for digital modules only!!! */
33e73e00 R	271	subdev->insn_config = unioxx5_insn_config;
110526ed	272
33e73e00	273	printk(KERN_INFO "subdevice configured\n");
110526ed KD	274
	275	return 0;
	276	}
	277
0a85b6f0 MT	278	static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	279	unsigned int *data, int channel, int minor)
110526ed KD	280	{
	281	int channel_offset, val;
	282	int mask = 1 << (channel & 0x07);
	283
c3744138 BP	284	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	285	if (channel_offset < 0) {
110526ed	286	printk(KERN_ERR
0a85b6f0 MT	287	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	288	minor, channel);
110526ed KD	289	return 0;
	290	}
	291
33e73e00 R	292	/* getting previous written value */
33e73e00 R	293	val = usp->usp_prev_wr_val[channel_offset - 1];
110526ed KD	294
	295	if (*data)
	296	val \|= mask;
	297	else
	298	val &= ~mask;
	299
	300	outb(val, usp->usp_iobase + channel_offset);
33e73e00 R	301	/* saving new written value */
33e73e00 R	302	usp->usp_prev_wr_val[channel_offset - 1] = val;
110526ed KD	303
	304	return 1;
	305	}
	306
	307	/* function for digital reading */
0a85b6f0 MT	308	static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	309	unsigned int *data, int channel, int minor)
110526ed KD	310	{
	311	int channel_offset, mask = 1 << (channel & 0x07);
	312
c3744138 BP	313	channel_offset = __unioxx5_define_chan_offset(channel);
c3744138 BP	314	if (channel_offset < 0) {
110526ed	315	printk(KERN_ERR
0a85b6f0 MT	316	"comedi%d: undefined channel %d. channel range is 0 .. 23\n",
0a85b6f0 MT	317	minor, channel);
110526ed KD	318	return 0;
	319	}
	320
	321	*data = inb(usp->usp_iobase + channel_offset);
	322	*data &= mask;
	323
	324	if (channel_offset > 1)
	325	channel -= 2 << channel_offset; /* this operation is created for correct readed value to 0 or 1 */
110526ed KD	326	*data >>= channel;
	327	return 1;
	328	}
	329
	330	#if 0 /* not used? */
da91b269	331	static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode)
110526ed KD	332	{
	333	int i, mask;
	334
	335	mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
	336	printk("COMEDI: mode = %d\n", mask);
	337
	338	outb(1, usp->usp_iobase + 0);
	339
	340	for (i = 0; i < 3; i++)
	341	outb(mask, usp->usp_iobase + i);
	342
	343	outb(0, usp->usp_iobase + 0);
	344	}
	345	#endif
	346
0a85b6f0 MT	347	static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	348	unsigned int *data, int channel, int minor)
110526ed KD	349	{
	350	int module, i;
	351
	352	module = channel / 2; /* definig module number(0 .. 11) */
	353	i = (channel % 2) << 1; /* depends on type of channel (A or B) */
	354
	355	/* defining if given module can work on output */
	356	if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
	357	printk(KERN_ERR
0a85b6f0 MT	358	"comedi%d: module in position %d with id 0x%0x is for input only!\n",
0a85b6f0 MT	359	minor, module, usp->usp_module_type[module]);
110526ed KD	360	return 0;
	361	}
	362
	363	__unioxx5_analog_config(usp, channel);
	364	/* saving minor byte */
	365	usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
	366	/* saving major byte */
	367	usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);
	368
2696fb57	369	/* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
33e73e00 R	370	/* sending module number to card(1 .. 12) */
33e73e00 R	371	outb(module + 1, usp->usp_iobase + 5);
110526ed KD	372	outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */
	373
	374	/* sending for bytes to module(one byte per cycle iteration) */
	375	for (i = 0; i < 4; i++) {
6fd071cc JS	376	while (!((inb(usp->usp_iobase + 0)) & TxBE))
6fd071cc JS	377	; /* waits while writting will be allowed */
110526ed KD	378	outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
	379	}
	380
	381	return 1;
	382	}
	383
0a85b6f0 MT	384	static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
0a85b6f0 MT	385	unsigned int *data, int channel, int minor)
110526ed KD	386	{
	387	int module_no, read_ch;
	388	char control;
	389
	390	module_no = channel / 2;
	391	read_ch = channel % 2; /* depend on type of channel (A or B) */
	392
	393	/* defining if given module can work on input */
	394	if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
	395	printk(KERN_ERR
0a85b6f0 MT	396	"comedi%d: module in position %d with id 0x%02x is for output only",
0a85b6f0 MT	397	minor, module_no, usp->usp_module_type[module_no]);
110526ed KD	398	return 0;
	399	}
	400
	401	__unioxx5_analog_config(usp, channel);
33e73e00 R	402	/* sends module number to card(1 .. 12) */
33e73e00 R	403	outb(module_no + 1, usp->usp_iobase + 5);
110526ed KD	404	outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */
	405	control = inb(usp->usp_iobase); /* get control register byte */
	406
	407	/* waits while reading four bytes will be allowed */
6fd071cc JS	408	while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA))
6fd071cc JS	409	;
110526ed KD	410
	411	/* if four bytes readding error occurs - return 0(false) */
	412	if ((control & Rx4CA_ERR_MASK)) {
	413	printk("COMEDI: 4 bytes error\n");
	414	return 0;
	415	}
	416
	417	if (read_ch)
	418	data = inw(usp->usp_iobase + 6); / channel B */
	419	else
	420	data = inw(usp->usp_iobase + 4); / channel A */
	421
	422	return 1;
	423	}
	424
	425	/* configure channels for analog i/o (even to output, odd to input) */
da91b269	426	static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel)
110526ed KD	427	{
	428	int chan_a, chan_b, conf, channel_offset;
	429
	430	channel_offset = __unioxx5_define_chan_offset(channel);
	431	conf = usp->usp_prev_cn_val[channel_offset - 1];
	432	chan_a = chan_b = 1;
	433
	434	/* setting channel A and channel B mask */
	435	if (channel % 2 == 0) {
	436	chan_a <<= channel & 0x07;
	437	chan_b <<= (channel + 1) & 0x07;
	438	} else {
	439	chan_a <<= (channel - 1) & 0x07;
	440	chan_b <<= channel & 0x07;
	441	}
	442
	443	conf \|= chan_a; /* even channel ot output */
	444	conf &= ~chan_b; /* odd channel to input */
	445
	446	outb(1, usp->usp_iobase + 0);
	447	outb(conf, usp->usp_iobase + channel_offset);
	448	outb(0, usp->usp_iobase + 0);
	449
	450	usp->usp_prev_cn_val[channel_offset - 1] = conf;
	451	}
	452
	453	/* *\
	454	* this function defines if the given channel number *
	455	* enters in default numeric interspace(from 0 to 23) *
	456	* and it returns address offset for usage needed *
	457	* channel. *
	458	\* */
	459
	460	static int __unioxx5_define_chan_offset(int chan_num)
	461	{
	462
	463	if (chan_num < 0 \|\| chan_num > 23)
	464	return -1;
	465
	466	return (chan_num >> 3) + 1;
	467	}
90f703d3	468
40e7f510 HS	469	static int unioxx5_attach(struct comedi_device *dev,
	470	struct comedi_devconfig *it)
	471	{
	472	int iobase, i, n_subd;
	473	int id, num, ba;
	474
	475	iobase = it->options[0];
	476
	477	dev->board_name = DRIVER_NAME;
	478	dev->iobase = iobase;
	479	iobase += UNIOXX5_SUBDEV_BASE;
	480
	481	/* defining number of subdevices and getting they types (it must be 'g01') */
	482	for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
	483	id = inb(ba + 0xE);
	484	num = inb(ba + 0xF);
	485
	486	if (id != 'g' \|\| num != 1)
	487	continue;
	488
	489	n_subd++;
	490	}
	491
	492	/* unioxx5 can has from two to four subdevices */
	493	if (n_subd < 2) {
	494	printk(KERN_ERR
	495	"your card must has at least 2 'g01' subdevices\n");
	496	return -1;
	497	}
	498
	499	if (alloc_subdevices(dev, n_subd) < 0) {
	500	printk(KERN_ERR "out of memory\n");
	501	return -ENOMEM;
	502	}
	503
	504	/* initializing each of for same subdevices */
	505	for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
	506	if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
	507	dev->minor) < 0)
	508	return -1;
	509	}
	510
	511	printk(KERN_INFO "attached\n");
	512	return 0;
	513	}
	514
	515	static int unioxx5_detach(struct comedi_device *dev)
	516	{
	517	int i;
	518	struct comedi_subdevice *subdev;
	519	struct unioxx5_subd_priv *usp;
	520
	521	for (i = 0; i < dev->n_subdevices; i++) {
	522	subdev = &dev->subdevices[i];
	523	usp = subdev->private;
	524	release_region(usp->usp_iobase, UNIOXX5_SIZE);
	525	kfree(subdev->private);
	526	}
	527
	528	return 0;
	529	}
	530
	531	static struct comedi_driver unioxx5_driver = {
	532	.driver_name = DRIVER_NAME,
533	.module = THIS_MODULE,
534	.attach = unioxx5_attach,
535	.detach = unioxx5_detach,
536	};
537	module_comedi_driver(unioxx5_driver);
538
90f703d3 AT	539	MODULE_AUTHOR("Comedi http://www.comedi.org");
	540	MODULE_DESCRIPTION("Comedi low-level driver");
	541	MODULE_LICENSE("GPL");